package io;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

public class CopyDemo2 {
    public static void main(String[] args) throws IOException {
        FileInputStream fis = new FileInputStream("img.png");
        FileOutputStream fos = new FileOutputStream("img_2.png");
        long start = System.currentTimeMillis();
        byte[] buf = new byte[1024 * 10];
        int d;
        while ((d = fis.read(buf)) != -1){
            fos.write(buf, 0, d);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制耗时：" + (end - start) + "ms");
        System.out.println("复制完成");
    }
}
